Deflector for heaters.



J; s. MAKIN a; H. A. SGHELLMAN.

DEFLEGTOR FOR HEATERS.

APPLICATION FILED JULY 20,1911.

Patented Apr; 9, 1912.

` INVENTOR-S ATTORNEYS" WITNESSES UNITED sTaTns PATENT OFFICE.

JOHN S. MARIN AND HENRY A. SCHELLMAN, OF PHILADELPHIA, PENNSYLVANIA, I

ASSIGNORS T0 THE MARIN' HEATING SOMPANY, 0F Pt-llluifl)Il-ILPHIA.1 :PENNSYL- VANIA, A GOBPORATEO' 0F PENNSYLVANIA.

DEFLECTOR FOR HEATERS.

Specification o Letters Patent.

' Application filed July 2o, 1911.

Patented Apr. 9, 1912. serial No. 639,507.

o all whom it may concern: y

Be it known that we, JOHN S. MARIN and HENRY A. SCHELLMAN, both citizensof the United States, residing in the city and county of Philadelphia., State of Pennsyl- Vania, have invented a new and useful Deflector for Heaters, of which the following is a specication.

This invention relates to an improved furnacel casing, and more particularly to a construction of top or hood therefor, the object of the invention being to provide an improvement of the character wherein the pas sage for the air is directed to the supply pipes properly commingled, while a back' draft into the air passage is prevented.

In furnace hoods or tops as heretofore constructed, it has been proposed to provide an equalizin'g and commingling chamber adjacent the air supply conduits but it has been found in ractice that in such structures air currents requently flow in a reverse direction within the supply conduits and produce eddies of cold air which naturally reduce the effectiveness of the heaters. It has also been proposed to utilize baes in the air )assage around t-he fire chamber but such ba es act as retarding means for the air and do not eliminate the possibility of back draft with its attendant disadvantages.

In our present invention itis our object to eliminate defects heretofore Vinherent in structures of this kind by providing a battle struct-ure adjacent the discharge of the air passage and the inlet 'of theairwsupply conduits and so positioned as to preyertany back draft interfering with the free iow of air circulating about the fire chamber, and furthermore located exterior of the air passage but relative thereto in order to properly direct and mix the heated air.

F or the purpose of illustrating our invenstrumentalities as herein shown and de.-

scribed.

wardly extending flange 5 thereon, the latter being adapted to seat on the top of the casing 2 and forming an abutment upon which the top 7 rests. Attention is directed to the conformation of this top 7, since the` arrangement thereof embodies a feature of our invention and by means of which without increasing the size of the casing, the outlet conduits tl may be positioned suitably apart in order that the air currents in one will not affect the others and so that they will properly distribute the heated air to the points of use.

8 designates an outwardly ared portion of the top 7 preferably of inverted truncated frm, while the` remaining portion of the top is inwardly and upwardly inclined,

yand has therein the outlet conduits 6 of which there are any desired number for the use intended.

9 designates a defiector or baliie suitably secured to the top 7 and herein shown as resting upon the ring 4 and extending up- Wardly and inwardly from the outlet l-of the air passage formed between the two casings 1 and 2. This deflector 9 is so positioned, relative to the flared portion 8 of the top 7 as to form a pocket 10 therewith into which currents of air flowing from thev air conduits G Ainto the casing 2, may be directed and thus prevent them from meeting and retarding .the heated air discharging from the air passage 3.

11 designates a closure or cover, removably secured to the top 7 and preferably having a ldownwardly extending and substantially cone-shaped lower portion 12 which serves as a distributing wall, directing the air to the several conduits 6 and eliminating any dead air space within the top. This closure or cover 11 is provided with a circumferential iange 13 adapted to tit over the crimped edge'14 of the top 7 which as will be noted is angular and converges from a suitable point. Of course it "will be understood that the joint formed bythe topv 7 and the closure or cover 11 is tight and properly packed to prevent leakage lat 4this point. With this novel structurein use upon afurnace, the heated air Vproducts pass' freely upwardly in the passage 3 until the tap of the inner casing 1 is reached and'adjacent to which the dctiector is located 'and-positioned so that there is'no ldiminishing of the air passageor obstruction to the passage of air. The arrows shown in Fig. 1 ,indicate the direction of lflow ot the airwhich is directed inwardly .over the top of the furnace casing land then reaches the air conduits 6. The defector 9 is so positioned as to .prevent any hack drafts from the air conduits 6 from reaching the air passage 3, and it will be rnoted that the pocket 10 serves to collect air flowing in ,the reverse direction due to baclrdrafts should this occur, and preventf'tli'e same from effecting the free flow of heated air to the conduits 6. As a matter v of fact, the vcurrent produced by a back formed by the top structure and designing the saine so that there will be no retardation at this point.

Having thus described our invention, what we claim as new and desire to secure .by Letters Patent, is

1. In a furnace, an inner and an outer easingv forming an air-passage between them, a top consisting of an outwardly flaring lower portion and inwardly inclined upper portion, hot-air conduits extending from said upper portion, an inverted conical distributer supported upon said upper portion, and an annular upwardly and inwardly inclined deflector projecting at the upper end of the air-passage at a distance not less than the diameter of the same and projecting beneath the inlets of the hot-air conduits to intercept reverse air-currents in the saine. i

;2. In a furnace, an inner and an outer casing formin'gan air-passage between them, a ring within the upper end of said outer casing and having an outwardly projecting flange resting upon th'e'same, an annular top resting upon said fangeand having an outwardly flaring lower portion and an inf wardly inclined upper portion, hot-air conf duits extending from `said upper portion, an inverted conical cover supported upon the inner edge of the inwardly inclined upper portion of `the top, and an annular upwardly and inwardly inclined defiector supported from the top at the upper endo'f the air-passage at afdistance not less than the diameter of-the latter and projecting beneath' the inlets of the hot-air conduits to intercept reverse air-currents inthe same.

JOHN SMAKIN.

. HENRY A. SCHELLMAN. Witnesses; I

C. D. MCVAY, F. A. NEWTON.' 

